The change in the frequency of HIV-1 infection per million resting CD4 + cells will be measured after repeated short interval dosing with VOR in Step 4. The 4th leukapheresis (Visit 12) will be compared to the baseline leukapheresis done at Visit 2. If the VOR 400 mg dosing in Step 4 is interrupted due to toxicity or intolerance, then the leukapheresis will be performed as soon as possible after the VOR interruption. This is justified as if a depletion of resting cell infection can occur; new resting cell infection is unlikely to occur in the presence of ART. Test dosing in this Step will continue until the study's stopping (lack of response in five) or toxicity rules are met.